1.3.5.6	FAD	tightly bound to zeta-carotene desaturase CrtQb	
1.3.5.6	additional information	addition of the dinucleotides FAD, NADP+ or NAD+ alone or the latter in combination with ATP results in a negligible increase in zeta-carotene desaturase activity	
1.3.5.6	quinone	-	
1.3.5.6	quinone	the expression of zeta-carotene desaturase paralleles plastid terminal oxidase (PTOX, quinol:oxygen oxidoreductase) and zeta-carotene desaturase. The three genes are expressed when carotinoid biosynthesis is enhanced during fruit ripening. Tomato ghost mutant with impaired plastid terminal oxidase accumulate phytoene in leaves and fruits